Controllable superconducting nb long microbridge by low frequency, and its resonant characteristics

Keiji Tsukada; Toshimitsu Morooka

doi:10.1143/JJAP.31.L1536

Controllable superconducting nb long microbridge by low frequency, and its resonant characteristics

Keiji Tsukada, Toshimitsu Morooka

Research output: Contribution to journal › Article › peer-review

Abstract

A Nb superconducting microbridge is fabricated, 40-fim long, less than 0.25-/un wide and OA-fim thick.Four-terminal measurement of the I-V characteristics reveals hysterisis in the I-V curve.The microbridge has an excess current over its current in its normal state.Frequency resonance appears over the range of a few hundred kiloherz by electromagnetic wave radiation.The I-V characteristics show that critical current 7_C is depressed, and as radiation power increases 7_Cdecreases.This phenomenon is thought to be due to resonance of quasiparticles in the microbridge, and to resonance restricting the supercurrent.

Original language	English
Pages (from-to)	L1536-L1538
Journal	Japanese Journal of Applied Physics
Volume	31
Issue number	11
DOIs	https://doi.org/10.1143/JJAP.31.L1536
Publication status	Published - Nov 1992
Externally published	Yes

Keywords

Low frequency resonance
Microbridge
Nb
Quasiparticle excitation
Submicron structure

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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10.1143/JJAP.31.L1536

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title = "Controllable superconducting nb long microbridge by low frequency, and its resonant characteristics",

abstract = "A Nb superconducting microbridge is fabricated, 40-fim long, less than 0.25-/un wide and OA-fim thick.Four-terminal measurement of the I-V characteristics reveals hysterisis in the I-V curve.The microbridge has an excess current over its current in its normal state.Frequency resonance appears over the range of a few hundred kiloherz by electromagnetic wave radiation.The I-V characteristics show that critical current 7C is depressed, and as radiation power increases 7Cdecreases.This phenomenon is thought to be due to resonance of quasiparticles in the microbridge, and to resonance restricting the supercurrent.",

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AU - Tsukada, Keiji

AU - Morooka, Toshimitsu

PY - 1992/11

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N2 - A Nb superconducting microbridge is fabricated, 40-fim long, less than 0.25-/un wide and OA-fim thick.Four-terminal measurement of the I-V characteristics reveals hysterisis in the I-V curve.The microbridge has an excess current over its current in its normal state.Frequency resonance appears over the range of a few hundred kiloherz by electromagnetic wave radiation.The I-V characteristics show that critical current 7C is depressed, and as radiation power increases 7Cdecreases.This phenomenon is thought to be due to resonance of quasiparticles in the microbridge, and to resonance restricting the supercurrent.

AB - A Nb superconducting microbridge is fabricated, 40-fim long, less than 0.25-/un wide and OA-fim thick.Four-terminal measurement of the I-V characteristics reveals hysterisis in the I-V curve.The microbridge has an excess current over its current in its normal state.Frequency resonance appears over the range of a few hundred kiloherz by electromagnetic wave radiation.The I-V characteristics show that critical current 7C is depressed, and as radiation power increases 7Cdecreases.This phenomenon is thought to be due to resonance of quasiparticles in the microbridge, and to resonance restricting the supercurrent.

KW - Low frequency resonance

KW - Microbridge

KW - Nb

KW - Quasiparticle excitation

KW - Submicron structure

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Controllable superconducting nb long microbridge by low frequency, and its resonant characteristics

Abstract

Keywords

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